Pyrrolbenzodiazepines
View Patent ↗Compounds of formula (Ia) and (Ib) wherein A is CH 2 , or a single bond; R 2 is selected from: R, OH, OR, CO 2 H, CO 2 R, COH, COR, SO 2 R, CN; R 6 , R 7 and R 9 are independently selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn; and R 8 is selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn, where R is as defined above, or the compound is a dimer with each monomer being the same or different and being of formula (Ia) or (Ib), where the R 8 groups of the monomers form together a bridge having the formula —X—R′—X— linking the monomers, where R′ is an alkylene chain containing from 3 to 12 carbon atoms, which chain may be interrupted by one or more hetero-atoms and/or aromatic rings and may contain one or more carbon—carbon double or triple bonds, and each X is independently selected from O, S, or N; except that in a compound of formula (Ia) when A is a single bond, then R 2 is not CH═CH(CONH 2 ) or CH═CH(CONMe 2 ). Other related compounds are also disclosed
1. A pyrrolobenzodiazepine compound of the formula Ia or Ib:
wherein:
(a) A is CH 2 ;
R 2 is selected from: R, OH, OR, CO 2 H, CO 2 R, COH, COR, SO 2 R, or CN;
R 6 , R 7 and R 9 are independently selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn;
where R is a lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, whereof the alkyl group optionally contains one or more carbon—carbon double or triple bonds, which may form part of a conjugated system, or one or more carbonyl groups or one or more ether or thioether groups, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups;
and R 8 is selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn, where R is as defined above; or
(b) A is a single bond;
R 2 is an aryl group of up to 12 carbon atoms;
R 6 , R 7 and R 9 are independently selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn;
where R is a lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, whereof the alkyl group optionally contains one or more carbon—carbon double or triple bonds, which may form part of a conjugated system, or one or more carbonyl groups or one or more ether or thioether groups, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups;
and R 8 is selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn, where R is as defined above, or where the compound is a dimer with each monomer being the same or different and being of formula Ia or Ib, where the R 8 groups of the monomers form together a bridge having the formula —X—R1—X— linking the monomers, where R 1 is an alkylene chain containing from 3 to 12 carbon atoms, which chain may be interrupted by one or more hetero-atoms and/or aromatic rings and may contain one or more carbon—carbon double or triple bonds, and each X is independently selected from O, S, or N; or R 7 and R 8 together form a group —O—(CH 2 ) p —O—, where p is 1 or 2; or
(c) A is CH 2 , or a single bond;
R 2 is selected from: R, OH, OR, CO 2 H, CO 2 R, COH, COR, SO 2 R, or CN,
R 6 , R 7 and R 9 are independently selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn;
where R is a lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, whereof the alkyl group optionally contains one or more carbon—carbon double or triple bonds, which may form part of a conjugated system, or one or more carbonyl groups or one or more ether or thioether groups, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups; and
where the compound is a dimer with each monomer being the same or different and being of formula Ia or Ib, where the R 8 groups of the monomers form together a bridge having the formula —X—R 1 —X— linking the monomers, where R 1 is an alkylene chain containing from 3 to 12 carbon atoms, which chain may be interrupted by one or more hetero-atoms and/or aromatic rings and may contain one or more carbon—carbon double or triple bonds, and each X is independently selected from O, S, or N;
or R 7 and R 8 together form a group —O—(CH 2 ) p —O—, where p is 1 or 2.
2. A compound according to claim 1 , wherein A is CH 2 .
3. A compound according to claim 2 , wherein R 2 is CO 2 H, CO 2 R, or CH 2 OH.
4. A compound according to claim 3 , wherein R 2 is CO 2 Me, CO 2 t Bu, or CH 2 OH.
5. A compound according to claim 1 (c), wherein A is a single bond, and R 2 is an aryl group, or an alkyl or alkaryl group which contains at least one double bond which forms part of a conjugated system with a double bond of the pyrrolobenzodiazepine compound C-ring.
6. A compound according to claim 1 wherein R 6 , R 7 and R 9 and, unless the compound is a dimer, R 8 are independently selected from H and OR.
7. A compound according to claim 6 , wherein R 6 , R 7 and R 9 and, unless the compound is a dimer, R 8 are independently selected from H, OMe and OCH 2 Ph.
8. A compound according to claim 6 , wherein R 7 and, unless the compound is a dimer, R 8 are OR, and R 6 and R 9 are H.
9. A compound according to claim 8 , wherein R 7 and, unless the compound is a dimer, R 8 are independently either OMe or OCH 2 Ph.
10. A compound according to claim 1 which is a dimer, wherein the dimer bridge is of the formula —O—(CH 2 ) q —O—, where q is from 3 to 12.
11. A compound consisting of:
12. A compound of formula II:
wherein:
R 2 is O;
R 6 , R 7 and R 9 are independently selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn;
where R is a lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, whereof the alkyl group optionally contains one or more carbon—carbon double or triple bonds, which may form part of a conjugated system, or one or more carbonyl groups or one or more ether or thioether groups, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups;
and where the compound is a dimer with each monomer being the same or different and being of formula II, where the R 8 groups of the monomers form together a bridge having the formula —X—R 1 —X— linking the monomers, where R 1 is an alkylene chain containing from 3 to 12 carbon atoms, which chain may be interrupted by one or more hetero-atoms and/or aromatic rings and may contain one or more carbon—carbon double or triple bonds, and each X is independently selected from O, S, or N.
13. A compound according to claim 12 , wherein R 6 , R 7 and R 9 are independently selected from H, OR or a halogen atom.
14. A compound according to claim 13 , wherein R 6 , R 7 and R 9 are independently selected from H, OMe, OCH 2 Ph, and I.
15. A compound according to claim 13 , wherein R 7 is OR or a halogen and R 6 and R 9 are H.
16. A compound according to claim 15 , wherein R 7 is selected from OMe, OCH 2 Ph or I.
17. A compound according to claim 12 , wherein the dimer bridge is of the formula —O—(CH 2 ) q —O—, where q is from 3 to 12.
18. A compound of formula II:
wherein:
R′ 2 is CH 2 ;
R 6 , R 7 and R 9 are independently selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn;
where R is lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, whereof the alkyl group optionally contains one or more carbon—carbon double or triple bonds, which may form part of a conjugated system, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups, and optionally containing one or more carbonyl groups or one or more ether or thioether groups;
and R 8 is selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn, where R is as defined above or the compound is a dimer with each monomer being the same or different and being of formula II, where the R 8 groups of the monomers form together a bridge having the formula —X—R 1 —X— linking the monomers, where R 1 is an alkylene chain containing from 3 to 12 carbon atoms, which chain may be interrupted by one or more hetero-atoms and/or aromatic rings and may contain one or more carbon—carbon double or triple bonds, and each X is independently selected from O, S, or N.
19. A compound according to claim 18 , wherein R 6 , R 7 and R 9 and, unless the compound is a dimer, R 8 are independently selected from H, OR or a halogen atom.
20. A compound according to claim 19 wherein R 6 , R 7 and R 9 and, unless the compound is a dimer, R 8 are independently selected from H, OMe, OCH 2 Ph, and 1.
21. A compound according to claim 19 , wherein R 7 and, unless the compound is a dimer, R 8 are independently OR or a halogen atom and R 6 and R 9 are H.
22. A compound according to claim 21 , wherein R 7 and, unless the compound is a dimer, R 8 are independently selected from OMe, OCH 2 Ph or I.
23. A compound according to claim 18 which is a dimer, wherein the dimer bridge is of the formula —O—(CH 2 ) q —O—, where q is from 3 to 12.
24. A compound of the formula III:
wherein:
R 6 , R 7 and R 9 are independently selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn;
where R is a lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, whereof the alkyl group optionally contains one or more carbon—carbon double or triple bonds, which may form part of a conjugated system, or one or more carbonyl groups, or one or more ether or thioether groups, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups;
and R 8 is amino.
25. A compound according to claim 24 , wherein only one of R 6 , R 7 and R 9 is H.
26. A compound according to claim 24 , wherein at least one of R 6 , R 7 and R 9 is an aryl group of up to 12 carbon atoms, which is optionally substituted by one or more halo, hydroxy, amino, or nitro groups.
27. A compound according to claim 26 , wherein at least one of R 6 , R 7 and R 9 , is a phenyl group, optionally substituted by one or more nitro groups.
28. A compound according to claim 27 , wherein at least one of R 6 , R 7 and R 9 , is selected from: Ph, m-NO 2 -Ph and p-NO 2 -Ph.
29. A compound of formula IV:
wherein:
R 6 , R 7 and R 9 are independently selected from H, R, OH, OR, halo, amino, NHR, nitro, Me 3 Sn;
where R is a lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, whereof the alkyl group optionally contains one or more carbon—carbon double or triple bonds, which may form part of a conjugated system, or one or more carbonyl groups, or one or more ether or thioether groups, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups;
R 8 ′ and R 8 ″ are either independently selected from H, R or together form a cyclic amine; and
n is from 1 to 7.
30. A compound according to claim 29 , wherein R 6 and R 9 are selected from H and OR.
31. A compound according to claim 30 , wherein R 6 and R 9 are selected from OMe, OEt and OBn.
32. A compound according to claim 30 , wherein n is 1 to 3.
33. A compound according to claim 1 , claim 12 , claim 24 or claim 29 wherein R is selected from a lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, or an aryl group of up to 12 carbon atoms, optionally substituted by one or more halo, hydroxy, amino, or nitro groups.
34. A compound according to claim 33 , wherein R is selected from a lower alkyl group having 1 to 10 carbon atoms optionally substituted by one or more halo, hydroxy, amino, or nitro groups.
35. A compound according to claim 34 , wherein R is an unsubstituted straight or branched chain alkyl having 1 to 10 carbon atoms.
36. A process for preparing a compound according to claim 1 comprising cyclizing a compound of formula
wherein A, R 2 , R 6 , R 7 , R 8 and R 9 are as defined in claim 1 , R 10 is a nitrogen protecting group and CPQ is a masked aldehyde;
to a compound of formula
wherein A, R 2 , R 6 , R 7 , R 8 , R 9 and R 10 are as defined above and converting the above compound to a compound according to claim 1 .
37. A process for preparing a compound according to claim 12 comprising cyclizing a compound of formula
wherein R′ 2 , R 6 , R 7 , R 8 and R 9 are as defined in claim 13 , R 10 is a nitrogen protecting group and CPQ is a masked aldehyde;
to a compound of the formula
wherein R′ 2 , R 6 , R 7 , R 8 , R 9 and R 10 are as defined above, and converting the above compound to a compound according to claim 12 .
38. A process for preparing a compound according to claim 24 comprising cyclizing a compound of formula
wherein R 6 , R 7 , R 8 , and R 9 are as defined in claim 20 , R 10 is a nitrogen protecting group and CPQ is a masked aldehyde;
to a compound of formula
wherein R 6 , R 7 , R 8 , R 9 and R 10 are as defined above, and converting the above compound to a compound according to claim 24 .
39. A process for preparing a compound according to claim 29 comprising cyclizing a compound of formula
wherein R 6 , R 7 , R 8 ′, R 8 ″, and R 9 are as defined in claim 29 , R 10 is a nitrogen protecting group and CPQ is a masked aldehyde;
to a compound of formula
wherein R 6 , R 7 , R 8 ′, R 8 ″, R 9 and R 10 are as defined above, and converting the above compound to a compound according to claim 29 .
40. A composition comprising a compound according to claim 1 and a pharmaceutically acceptable carrier or diluent.
41. A composition comprising a compound according to claim 12 and a pharmaceutically acceptable carrier or diluent.
42. A composition comprising a compound according to claim 24 and a pharmaceutically acceptable carrier or diluent.
43. A composition comprising a compound according to claim 29 and a pharmaceutically acceptable carrier or diluent.
44. A method of treating cancer comprising administering an effective amount of a compound according to claim 1 or claim 18 to a patient in need of such treatment wherein the cancer is selected from lung cancer, colon cancer, CNS cancer, melanoma, renal cancer, breast cancer and ovarian cancer.
45. The method of claim 44 wherein the compound is selected from the group consisting of
46. A method of treating cancer comprising administering an effective amount of a compound wherein the compound is selected from the group consisting of
to a patient in need of such treatment and wherein the cancer is selected from lung cancer, colon cancer, CNS cancer, melanoma, renal cancer, breast cancer and ovarian cancer.
47. A method of treating cancer comprising administering an effective amount of a compound according to claim 24 to a patient in need of such a treatment wherein the cancer is selected from lung cancer, colon cancer, CNS cancer, melanoma, renal cancer and breast cancer.
48. A method of treating cancer comprising administering an effective amount of a compound of the formula
to a patient in need of such treatment wherein the cancer is selected from lung cancer, colon cancer, CNS cancer, melanoma, renal cancer, and breast cancer.
49. A method of treating cancer comprising administering an effective amount of a compound according to claim 29 to a patient in need of such treatment wherein the cancer is selected from lung cancer, colon cancer, CNS cancer, melanoma, renal cancer and ovarian cancer.
50. The method of claim 49 wherein the compound is selected from the group consisting of